Governor for steam-engines



' (No Model.)

* W. H. JONES.

GOVERNOR FOR STEAM ENGINES.

No. 540,741. P-atented'J'unje' 11,.1895.

NITED STATES? PATENT ()FFIQE.

WILLIAM H. Jones, OF BLUE oeAss, IOWA.

GOVERNOR FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 540,741, dated June 11,1895. Application filed June 18, 1894- Serial No. 614,998. (No model.)

To all whom. it may concerm Be it known that 1, WILLIAM H. JONES, acitizen of theUnited States, residing at Blue Grass, in the county ofScott and State of Iowa, have invented a new and useful Elec trioGovernor for Steam-Engines, of which the following is a specification.

My invention relates to governors for steam engines, but isdifferent inprinciple from; other governors, in that they are constructed withrevolving balls which are thrown out by centrifugal force as the engineincreases its speed, and this movement is made to partly close a valvein the feed pipe of the 'engine,; thereby cutting off a part of thesteam and using the expansion of the steam to any ex-;

tent desired. These objects I attain by'the' mechanism illustrated inthe accompanying drawings, in which Figure 1 is a top view of an engineand gov-I ernor complete and showing an electric battery connected withthe electromagnet. Fig. 2 is a side view of an engine and governorhaving the balance-wheel and a part of the main shaft removed to avoidobscuring other parts of the governor. Fig. 3 is a'view of a sectionremoved from support 7, Fig. 2, so as to show it better.' Fig.4. is aside view of circuit-breakerattached to the movement of a clock, bywhich it is' operated. Fig. 5 is atop view of the same.

Similar numbers refer to similar parts throughout the several views.

Fig. 1, is 'a view of a horizontal engine but my invention is applicableto any style of engines.

2, is a bar bent in a segment which moves upon a Wrist-pin in the top ofstandard 0, bolted to the engine bed. This standard, also arm 0 0, mustbe made to suit the particular engine it is to be placed upon. Upon bar2, are placed two contact pieces 3, 3.

' .These pieces are held by set-screws and can be moved to any pointupon this bar at pleasure. Bar 2, is bent in the form of a segment inorder that the distance it will be moved by arm 0 0 coming in contactwith contact pieces 3, 3, will be the same regardless of their positionupon it.

4,'is an arm extending from the back of bar 2, with va'noblong hole inthe end'of it,

through which passes the valve rod 5. Said rod is supported at its outerend by support 7, the other end of which enters the steam chest and isconnected with the valve that admits steam into the cylinder of theengine. Around the valve rod, before and behind arm 4, are placedcoil-springs 6, 6, resting against taps by which they can be adjusted.

7, is a support for the valve rod. The valve rod is made wider at itsbearingthan' at. other points and has two catches in it at equaldistances from its support which receives dog 8.

9, is a bar of brass or other'non magnetic material fastened to dog 8,Fig. 3. To the ends of this bar are fastened bar-magnets 10, 10, placedso that the same poles will be up.

l1,is an electro-magnet, formed by winding insulated wire around a coreof soft iron. This core is a little shorter than the distance betweenthe bar-magnets.

12, is a spring catch fastened to support 7,

Fig. 2, and having a set-screw behind it for tightening it. This catchreceives a stud in bar 2, and ,holds the bar when moved either out or inby arm 00, on the cross-head of the engine.

13, is an eccentric rod, having a slot near its end and provided withset-screws by which said slotcan be lengthened or shortened at pleasure.In this slot works a wrist-pin in valve rod '5. The other end of thiseccentric rod is connected with an eccentric on the main two toothedwheels 16 carefully insulated f root the shaft and from one another,andset on the shaft in such a manner that a tooth in one of them willcome in the middle of the space between the teeth in its companion. 17,is a support for connection wires. One of the their hubs.

wheels on shaft 15, is connected with the positive pole of a battery ordynamo, the other with the negative. This can be done by causing theconnections to slightly press against To the end of the wires from theelectro magnet are fastened connections wide enough to cover the face ofboth wheels, and held by support 17, in such a manner that the points ofthem will touch a tooth on the two 1 wheels at just the same time;thereby making a connection and a current of electricity sets in throughone of the Wheels, and from there through the electro-magnet returningthrough the other wheel to the starting point. When [5 the wheels moveup a little two more teeth are touched but they are on different wheelsfrom the first ones touched and the current again sets in but it flowsin the opposite direction in the electro magnet. The connections thatcarries the current to and from the companion wheels must be insulatedfrom their support and the points of them also the teeth of the wheelsbe tipped with platinum or other material that will not corrode underthe electric a 5 spark.

The action of the governor is as follows: Steam is admitted into thecylinder which drives the piston out, and arm 0 0, on the cross-head isbrought in contact with con- 0 tact piece 3, which pushes back bar 2,and

spring catch 12 holds it. This hastighteued spring 6, and moved thevalve rod until dog 8, has stopped it. The valve is now standing oncenter and all or nearly all of the steam is cut oil and the steam inthe cylinder expands to complete the stroke. At just the right instantconnection is made through the companion wheels and a current ofelectricity flows through the electro magnet, causing its c'f'core tobecome a magnet, one end of which is a north pole and attracts one ofbar magnets 10. The other end is a south pole and repels the other barmagnet 10. This lifts dog 8, and spring 6 moves the valve rod and steamis admittcd into the other end of the cylinder.

The return stroke is just the same only the current of electricity ismade to flow in the opposite direction in the electro magnet, therebyreversing its poles and with the result that the bar magnet that wasattracted before is now repelled and the other one attracted therebylifting the other end of dog 8.

The eccentric rod 13, Fig. 2, with its adjustable slot serves thefollowing purpose:

If more steam is admitted into the cylinder than is necessary tocomplete the stroke in the interval of time between the pulses ofelectricity the piston will start on the return stroke by the momentumof the balance wheel,

and the eccentric will have drawn this rod thereby admitting less steamand reducing the speed.

The speed of the engine can be changed by having two or more sets ofcompanion wheels 16, 16, with a greater or less nnmberof teeth on them,or by changing the pinion of shaft 15, for a larger or smaller one.

I am awarethat prior to myinvention, governors for steam engines havebeen made; but they have been constructed upon the principle ofrevolving balls so arranged that as the engine increased its speed, theyare thrown outward by centrifugal force and this is made to turn a valvein the feed pipe of the engine cutting off a part of the steam andthereby reducing the speed. It is evident that such a governor cannot beperfect, as the engine must increase its speed before the governor canact; also an engine using this kind of a governor cannot get the fullexpansion of the steam as it is intended only to admit steam enough andthat at reduced pressure to keep up the speed desired. My governor actsindependent of the speed of the engine and admits steam into thecylinder at full boiler pressure thereby getting the full effect of theexpansion of the steam in the cylinder.

What I do claim as my invention, and dcsire to secure by Letters Patent,is-

1. In an electric governor for steam engines the combination of acircuit breaker with a valve and rod, an eccentric and rod provided witha slot which is adjustably connected to the valve rod by a pin throughsaid slot; an arm 0 O; a bar having upon it movable contact pieces, andan arm extending from said bar and connected with adjustable springs andthrough saidsprings with a valve rod; a support for a valve rod having apin upon which oscillates a dog, said dog engaging catches or notches ina valve rod; a non magnetic bar attached to said dog, and two barmagnets attached to said bar; an electro magnet fastened to said valverod support; a spring catch which engages a stud in bar 2, substantiallyas described.

2. In an electric governor for steam engines the combination of acircuit breaker having its frame attached to the movement of a clock orchronometer, said circuit breaker having a frame and a shaft, said shafthaving upon it two companion wheels and a pinion which engages a wheelin the clock; a sup- IEO port for connections and the connections held

